[Nadadekoko] Lovey-dovey with my niece by the river (COMIC LO 2020-06) [Pedy]

Naomi Hodaka, a fifth grader with sun-baked tanlines, is back in her countryside hometown for summer—and a proper date with her uncle Tadamasa, the man she affectionately calls Oniichan. Fresh off becoming lovers in the bath just the day before, a deep tongue-tangled kiss quickly melts into something far steamier, her school swimsuit doing nothing to cool the heat as hands wander and bodies press close. Between teasing worries about next year's pool classes and breathy promises that neither will ever forget this, the eager little tease climbs on top to ride her Oniichan through a secret summer neither of them wants to end.